I know there's a similar question here. But that discussion dissolved into lunar cycle and a correlation with it. I want to find more towards the original question of is there a periodic hormone cycle in men. The links i have read suggest that there's probably a daily one for sure. But few hint at monthly ones too. That link seems to have very shaky science, but my biology is too weak for me to find the actual studies. Anyone else with more informed opinions? Any studies tracking purely hormone levels in men over a period of couple of months/years?
[EDIT] I understand it's clear there are cycles within the day or around the 24-hr mark now. I still am looking for studies focusing on longer term cycles like week,months etc.